In the police station I saw the man from ________ room the thief had stolen the TV set.
一列快车和一列慢车的长分别为180米和225米,若同向行驶,从快车追及慢车起到全部超过,需81秒.现设快车的车速为x米/秒,慢车的车速为y米/秒,则表示其等量关系的式子是( )
含有三个实数的集合既可表示成{a,ba,1},又可表示成{a2,a+b,0},则a2015+b2016=____